Optical Communications from a Fourier Perspective: Fourier Theory and Optical Fiber Devices and Systems covers a broad range of subjects spanning Fourier theory and signal analysis over photonic components, including time lenses in optical communication. Sections discuss wave propagation in optical waveguides based on Maxwell equations and the nonlinear Schrödinger equation, various modulation formats, coherent detection, and required bandwidth. Other important subjects such as noise, linewidth, and coherence are discussed in relation to semiconductor lasers. Detailed derivations and a deeper background for the chapters are provided in appendices where appropriate.